What should your baby’s sleep environment be like? Temperature, clothing and practical sleep solutions
Sleep means much more to your baby than simply resting. During sleep, their body develops, neural connections mature, and they process the many new experiences they have had throughout the day. Calm, good-quality sleep also supports physical growth. When your baby is well rested, they are often more settled, cheerful and better able to cope with everyday stimulation. That is why it is worth making sure they sleep in comfortable clothing and in a room with a suitable temperature.
But what does an ideal sleep environment look like? What temperature should the room be, and what should your baby wear? Why do many parents choose a baby sleeping bag, and what other practical or comfort-focused products might be useful around the cot? There are plenty of options, and LiaaBébé is here to help make the choice feel simpler.
What should your baby’s sleep environment be like?
When choosing sleepwear, always use the room temperature as your guide rather than the season:
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Dress your baby in one more layer than you would comfortably wear.
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At 18 to 19°C, use layers: a baby bodysuit, sleepsuit and a 2.5 TOG baby sleeping bag
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At 20°C, choose a short-sleeved baby bodysuit with a sleepsuit and a 1.5 TOG baby sleeping bag or baby blanket, or a long-sleeved baby bodysuit with a 2.5 TOG baby sleeping bag.
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At 22 to 23°C, a baby bodysuit with a sleeping bag may be enough.
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At around 24°C, a short-sleeved baby bodysuit with a sleepsuit or a 0.5 TOG baby sleeping bag may be suitable.
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Newborns may sometimes need one extra lightweight layer. Choose breathable, natural fabrics.
Baby products that may support sleep:
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Cradle, bedside crib, baby sleeping bag, breathing monitor, baby monitor and soothing sleep sounds
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Safety: no product replaces attentive parental supervision
How do babies regulate their body temperature?
A baby’s body is still learning how to keep its temperature balanced. While an adult body adapts more efficiently to warmth or cold, a young baby’s temperature regulation is less developed, especially during the first few weeks. This means babies may warm up more quickly, but they may also lose heat faster. Room temperature, humidity and how much they move can all affect how comfortable they feel. It is therefore important to adapt their clothing to the current conditions and pay attention to their physical signs.
Newborn and premature babies need extra attention
Newborn and premature babies are not yet able to regulate their body temperature as effectively, so they may become too cold or too warm more easily. This makes it especially important to choose both the room temperature and their clothing carefully. Soft, breathable fabrics can help your baby feel more comfortable while sleeping. LiaaBébé bamboo baby clothing feels gentle to wear and may help support a more comfortable temperature.
Room temperature and body temperature change during the night
Neither your baby’s body temperature nor the temperature of the room stays completely constant throughout the night. Body temperature falls slightly as we drift off, then naturally rises again towards morning. You may notice this yourself when you wake after kicking off your covers. If the room temperature also changes during the night, your baby may feel chilly at one point and too warm later. Alongside layering, it can therefore help to choose breathable clothing that supports a more balanced temperature.
A sleeping bag is one of the most practical sleep solutions
A blanket can slip off during the night, and a baby cannot yet pull it back over themselves. This is why many parents prefer a baby sleeping bag. It can help maintain a more consistent level of warmth throughout the night.
A well-fitting sleeping bag:
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does not slip off
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does not cover the face
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may help maintain a more consistent temperature
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allows comfortable movement
The TOG rating helps you match the thickness of the sleeping bag to the room temperature. These practical benefits are among the reasons mums choose our baby sleeping bags and sleeping bags with feet.
Sleepsuit or pyjamas?
A zip sleepsuit and footed romper are among the most practical options for night-time. They do not ride up around the waist, leave the tummy or lower back exposed, and they help keep the nappy in place. A footed style is particularly convenient because you do not need to worry about your baby kicking off their socks during the night. In very warm weather, you can choose lightweight summer zip sleepsuits.
Many parents also like pyjamas from an early age because they can make nappy changes easier, and children may feel a little more grown-up in them. LiaaBébé pyjamas are designed with high-waisted bottoms and tops that are long enough to help keep little backs covered. Summer pyjamas are also available for warmer nights.
What other products might you choose for your baby’s sleep?
Traditional baby cradle
In the womb, your baby lived in a close, protected space and felt constant gentle movement. After birth, the world suddenly becomes much larger, louder and full of new stimulation, which may feel unsettling at first.
A rocking cradle can recreate some of that familiar sense of movement. The smaller space may feel reassuring and make settling easier, while gentle rocking can provide a calming sensory experience.
Bedside crib
A bedside crib allows your baby to sleep on a separate sleep surface while remaining close to the parents. Your baby sleeps on their own mattress in a small crib placed beside the parents’ bed, while mum can reach them easily, offer comfort or breastfeed during the night. This arrangement may reduce some of the risks associated with sharing the same bed and can also allow a breathing monitor to be used according to the manufacturer’s instructions.
Baby nest
A baby nest is a soft resting space with raised sides that creates a smaller, more enclosed area. It may help soften contact with the harder parts of the cot and make the space feel cosier. However, it should only be used under supervision because a baby may turn their face towards the soft sides. It is also not recommended for tummy sleeping.
Baby swaddle
Swaddling used to be a standard part of a baby’s layette. Today, parents tend to use it more cautiously, and opinions vary. Its purpose is to create a warm, enclosed feeling that may remind a baby of the womb.
It may also make it easier to hold and settle your baby securely. However, it should not be too tight because the hips need room to move freely. A flexible, hip-friendly option is therefore the better choice.
Baby sleeping bag and sleeping bag with feet
A baby sleeping bag can be a comfortable alternative if you do not want to use a swaddle. It gives a warm, soft feeling for sleep while keeping the baby covered. It is important to choose a good-quality, breathable style with the right fit.
LiaaBébé sleeping bags are made from fabric containing bamboo fibres, which makes them soft and flexible and may help support a more balanced temperature. In warmer weather, they feel light and airy, while in cooler conditions they may help retain warmth. Your baby can move freely inside while the sleeping bag gently surrounds them. A well-designed neckline helps reduce slipping, and older children can continue wearing a sleeping bag with feet.
Breathing monitor
Sudden infant death syndrome is rare but serious, and its exact cause is still not fully understood. Many parents therefore look for additional products that may give them greater reassurance.
A breathing monitor is a device that alerts the parent if it does not detect the expected movement associated with breathing. This gives the parent an opportunity to check the baby immediately and seek help if needed. It is also important to know the basic steps of infant first aid and resuscitation so that you feel more prepared in an emergency.
Baby monitor and video baby monitor
A baby monitor can give you greater awareness while you are in another part of the home, but it does not replace regular parental checks and attention. A standard baby monitor transmits sound, letting you hear when your baby is waking or moving. A video monitor also provides an image, so you may be able to check how your child is sleeping on your phone.
Cot bumper
There are many types of cot bumper available, so it is worth considering safety and comfort as well as appearance.
Thin fabric bumpers may soften draughts or contact with a cooler wall-side surface, while thicker braided designs create a cosier, more enclosed feel. However, they should always be secured carefully, and it is important to make sure your baby cannot press their face into the soft sections and that airflow around the cot is not restricted.
Canopy above the cot
A canopy remains a popular decorative feature for many cots, although its role is usually more aesthetic than practical. Any fabric placed near a baby should be considered carefully because it may present a risk if your baby can reach it and pull it down. Safety should always come before decoration around the cot.
Night light
Many parents wonder whether a night light helps their baby sleep or disturbs them. A dim, warm light may be practical for you at night, but it can also affect melatonin production and sleep depth.
A baby’s biological clock, or their circadian rhythm, is not fully established during the first few weeks, which is why babies often mix up day and night. This usually begins to settle at around 6 to 8 weeks. Artificial light may signal to the body that it is daytime, so a darker environment is generally more suitable for sleep. When light is needed, choose a dim lamp with a warm tone for feeding or nappy changes.
Soft toys, devices and toys that play sleep melodies
Soothing melodies may help some babies settle because they create a familiar and pleasant sound. When used consistently as part of bath time or bedtime, they may become a recognisable part of the evening routine.
White noise works slightly differently. It is a steady, repetitive sound that can mask surrounding noise, reducing the amount of sudden stimulation reaching your baby. For some babies, this may support calmer settling because unexpected sounds are less likely to disturb them.
Written by Mónika Veres
References:
NHS: Baby safer sleep advice
The Lullaby Trust: How to dress your baby for sleep
